Principal gold-producing districts of the United States,
Koschmann, Albert Herbert, 1896-1962.
Principal gold-producing districts of the United States, by A. H. Koschmann and M. H. Bergendahl. - Washington, U.S. Dept. of the Interior, 1968. - v, 283 p. illus., maps. 30 cm. - Geological Survey professional paper 610 . - Geological Survey professional paper ; 610. .
Bibliography: p. 263-276.
gs 68000342 //r882
Gold mines and mining--United States.
Gold ores--United States.
QE75 / .P9 no. 610
553/.41/0973
Principal gold-producing districts of the United States, by A. H. Koschmann and M. H. Bergendahl. - Washington, U.S. Dept. of the Interior, 1968. - v, 283 p. illus., maps. 30 cm. - Geological Survey professional paper 610 . - Geological Survey professional paper ; 610. .
Bibliography: p. 263-276.
gs 68000342 //r882
Gold mines and mining--United States.
Gold ores--United States.
QE75 / .P9 no. 610
553/.41/0973